2026-03-12 20:23:15
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124
Kevin_Meade/showtopcpu11g.sql
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124
Kevin_Meade/showtopcpu11g.sql
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--
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-- create a multi-part report on database SQL by instance
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-- grouping SQL into powers of ten based on cpu consumed
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-- in order to see easily the top 1% of queries that are most busy
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--
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set linesize 999
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set pagesize 50000
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set feedback 1
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set trimspool on
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set trimout on
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set doc off
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clear breaks
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clear computes
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set echo off
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-- alter session set nls_date_format = 'dd-mon-rrrr hh24:mi:ss';
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select * from v$version
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/
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select inst_id
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,instance_name
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,startup_time
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,round((sysdate-startup_time),1) up_days
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,round(round((sysdate-startup_time),1)*24) maximum_cache_hours
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,to_char(sysdate,'dd-mon-rrrr hh24:mi:ss') right_now
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from gv$instance
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order by inst_id
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/
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--
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-- show how long the database has been up, how many cpus are available, and thus the theoretical CPU available
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--
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select inst_id
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,instance_name
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,(select cpu_count_highwater from sys.v_$license) cpu_count
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,round((round((sysdate-startup_time),1)*24)*(select cpu_count_highwater from sys.v_$license)) available_cpu_hours
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from gv$instance
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order by inst_id
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/
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col sql_text format a700 trunc
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col sql_text clear
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col sql_text format a700 trunc
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col pct_total format 990
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compute sum of sql_statements on inst_id
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compute sum of sql_statements on report
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compute sum of db_pct_total on inst_id
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compute sum of db_pct_total on report
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compute sum of running_consumed_cpu_hours on report
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break on inst_id skip page on report
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--
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-- use a logarithmic scale to plot cpu consumtion of all queries in the cache
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-- we can use this to zero in on the top consumers
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-- notice we exclude PLSQL CALLS but not the sql inside these calls
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-- this gives us the true SQL workload
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--
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select
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inst_id
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,cpu_time_log10
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,sql_statements
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,cpu_time_rounded,round(cpu_time) cpu_time
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,round(100*ratio_to_report(cpu_time) over(partition by inst_id)) inst_pct_total
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,round(100*ratio_to_report(cpu_time) over()) db_pct_total
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,round(sum(cpu_time) over (partition by inst_id order by cpu_time_log10)) running_cpu_time
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,round(round(sum(cpu_time) over (partition by inst_id order by cpu_time_log10))/60/60,2) running_consumed_cpu_hours
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from (
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select
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inst_id
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,trunc(log(10,mycpu_time)) cpu_time_log10
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,count(*) sql_statements
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,power(10,trunc(log(10,mycpu_time))) cpu_time_rounded
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,sum(mycpu_time) cpu_time
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from (
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select inst_id,case when cpu_time <= 0 then 1 else cpu_time end/1000000 mycpu_time
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from gv$sqlarea
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where trim(upper(sql_text)) not like 'BEGIN%'
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and trim(upper(sql_text)) not like 'DECLARE%'
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and trim(upper(sql_text)) not like 'CALL%'
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)
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group by trunc(log(10,mycpu_time)),inst_id
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) a
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order by inst_id,a.cpu_time_log10
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/
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clear computes
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col module format a30 word
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col sec_per_exec format 999999990.0
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--compute sum of cpu_seconds on inst_id , report
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break on inst_id skip page
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--
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-- show use the actual SQL that exceeds some threshhold
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-- these are the queries we want to concentrate on
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-- configure the last AND predicate to whatever is reasonable based on the above query
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--
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select inst_id
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,sql_id
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,child_number
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,trunc(cpu_time/1000000) cpu_seconds
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,trunc(elapsed_time/1000000) eplapsed_seconds
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,executions
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,round(trunc(elapsed_time/1000000)/decode(executions,0,null,executions),1) sec_per_exec
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,round((sysdate-to_date(first_load_time,'rrrr-mm-dd/hh24:mi:ss'))*24) hours_in_cache
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,module
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-- ,address
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,hash_value
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,(select 'Open' from gv$open_cursor b where b.inst_id = a.inst_id and b.address = a.address and b.hash_value = a.hash_value and rownum = 1) open
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/*
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,case when sql_text like '%SELECT /*+ ORDERED NO_EXPAND USE_HASH%' or sql_text like '%FROM :Q%' or instr(sql_text,'CIV_GB') > 0 or instr(sql_text,'PIV_GB') > 0 or instr(sql_text,'PIV_SSF') > 0 or instr(sql_text,'SWAP_JOIN_INPUTS') > 0 then 'Slave'
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when sql_text like '%SELECT /*+ Q%' then 'Query'
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else (select 'Yes' from gv$sql_plan b where b.inst_id = a.inst_id and b.address = a.address and b.hash_value = a.hash_value and b.child_number = a.child_number and b.other_tag like 'PARALLEL%' and rownum = 1)
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end parallel
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*/
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,sql_text
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from gv$sql a
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where trim(upper(sql_text)) not like 'BEGIN%'
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and trim(upper(sql_text)) not like 'DECLARE%'
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and trim(upper(sql_text)) not like 'CALL%'
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and cpu_time/1000000 >= 1000
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--and cpu_time/1000000 >= 100
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order by 1,4,5
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/
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